______,Mix in flour. Roll into 2 logs approximately 1 1/2 inches in diameter. Wrap in waxed paper and chill for two hours in refrigerator.,Slice 1/4 inch thick and place pecan half centered on top. Place on ungreased cookie sheet.,Bake in a 375 degree oven for 10 minutes. Watch carefully and do not let cookie get brown as the flavor will be damaged.,Place on paper towels and while still warm sift powdered sugar over top of each cookie. Store in air tight container. Keeps well for two weeks and freezes well.